No, even if it was possible, calling wp_footer() won’t work.
MapPress wasn’t designed to display the maps in anything but a blog page, so I don’t think there’s a solution using the current version.
However – I’d like to take a look to see if the plugin can be modified to work in the scroller. Could you send me a link your blog, and tell me which infinite scroll plugin you’re using?
Please use the contact form so I can email you directly. I’ll post any updates here.